steve m
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| posted on 10/9/15 at 10:39 AM |
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Gearbox broken mounting ears poss fixed now
Hi all
Ive got a type 2 gearbox in my 7, and last years on the yearly "lets take it to bits" over the winter, I noticed that 3 of the four
mounting ears for the alu rear casing, that fits the front cast iron block, had cracked and I was losing oil
So, I rebuilt the box, with new bearings gaskets etc, and a new (off another box) tail alui housing
ive had an oil leak for a while, so inspected the box in my car, and both bottom mounts have cracked
NOT HAPPY !! has any one had similar problems ? as a 1660 xflow, is not going to put immense strain on the box, and googling gearbox failures,
normally results in sheared or broken teeth, not a casing breaking
Both engine mounts and single gear box mount are solid, so there's minimul movement
both prop shaft couplings seem to be fine, and I don't have any severe vibration, although the gear lever does wag a bit in fourth
a pic of a similar box to mine, and circled in red the "mounting ears" that have cracked
[Edited on 11/9/15 by steve m]
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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redturner
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| posted on 10/9/15 at 11:05 AM |
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First indications would be that the prop shaft has cause that. Has it been balanced.....
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Paul Turner
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| posted on 10/9/15 at 11:11 AM |
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The vehicle your box came from could well have been in a smash before you got the box. Your only option is a replacement box or get a replacement tail
casing. Driving it as it is is not an option.
Ideal opportunity to fit a Type 9 or Type E (if you are happy with 4 speeds).
Get one with a better first gear ratio while you are doing it. Best money you will spend.
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owelly
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| posted on 10/9/15 at 11:20 AM |
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You say teh engine and gear box mounts are solid? Could there be a bit of chassis flex that's causing the damage?
http://www.ppcmag.co.uk
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steve m
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| posted on 10/9/15 at 11:29 AM |
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HI
Propshaft was balanced when I built the car , 1998 ish and never had any work done to it, for it to unbalance itself
Chassis flex would cause other problems, like buckeling the alui panels, so I will rule that one out for the moment
a type 9 will not fit with out a good rebuild/rework of the tunnel, and yes I tried!
Ive just checked the oil level, and its only lost a very small amount, so for now I will live with the problem, and when the car is off the road for
winter investigate it more
but thanks anyway!
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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redturner
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| posted on 10/9/15 at 11:36 AM |
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You have to remember that that type of tailshaft housing did hundreds of thousands of miles in road cars with out any cracking, or at least I never
had a problem. Something on that car must be causing it..............
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steve m
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| posted on 10/9/15 at 11:46 AM |
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YEP !!
BUT WHAT !
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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r1_pete
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| posted on 10/9/15 at 11:51 AM |
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Is the gearbox mounting rubber too hard, and not allowing the box to move as much as the engine, and transferring general driving around shocks to the
box rather than absorbing them??
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Theshed
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| posted on 10/9/15 at 11:57 AM |
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By solid do you mean that the engine is mounted to the chassis with no rubber mountings at all? If so there is your answer. That gearbox was never
intended to act as a load bearing member. All chassis flex it is just a question of how much.
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Oldaker
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| posted on 10/9/15 at 12:04 PM |
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Steve. You collected my old Type 2 gearbox a few months ago for spares. If you need another one, I have just acquired one having changed a gearbox
last weekend on a friends car. This one is very noisy, but good for spares. Pop down and collect if you want it - I'm in Newick still.
Message me if you want further details
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steve m
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| posted on 10/9/15 at 12:20 PM |
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The engine does move when rocked, but not very far, also the gearbox mount is the original escort mk2 one but welded on to the chassis, and as far as
I can see or feel, all appears to be fine
as for another box, yes please !
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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Angel Acevedo
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| posted on 10/9/15 at 12:33 PM |
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Warped Block maybe?
Put straightedge all around.
Or maybe debris causing the ears to be on tension rather than in shear?
Beware of what you wish.. for it may come true....
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r1_pete
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| posted on 10/9/15 at 02:53 PM |
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Another thought, is there a gasket between the two parts, and over tightening the bolts?
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MikeRJ
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| posted on 10/9/15 at 03:30 PM |
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I strongly suspect the solid gearbox mount is exactly what's causing the problem. Just a bit of misalignment of the brackets will put the
relatively fragile alloy casting under significant stress, and chassis flex will only add to that. Replace it with a rubber mount; you don't
need a solid gearbox mount if the engine is already solidly mounted (and the wisdom of solid mounting a car engine in a Locost chassis is debatable).
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steve m
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| posted on 10/9/15 at 04:53 PM |
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Overtightening the bolts, mmm, that could be a very valid point,
the gearbox mount is the standard rubber one from the escort, and it is mallable and not solid,
But I do appreciate the responses as we will resolve this issue at some point
regards
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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bob
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| posted on 10/9/15 at 05:19 PM |
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What are the torque settings for those bolts Steve ?
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redturner
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| posted on 10/9/15 at 05:57 PM |
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If you mean the sets which secure the extension to the gear box, just make them tight enough. This will not break the lugs off.....
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rusty nuts
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| posted on 10/9/15 at 06:22 PM |
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An out of balance prop can cause all sorts of problems including gearbox breakages, just because you had the prop balanced doesn't mean that
it's still balanced. Have known several props to lose the balance weights over the years
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Brian R
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| posted on 11/9/15 at 12:19 PM |
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Seen these break on 750MC racecars. If yours is the same as your picture then it has a steel tube for selector shaft.
The stronger tailshaft is all alloy. These are fitted to the Sport and GT I believe. We used this type racing as it is far superior.
Compare them in the photo of this ebay listing. Far left alloy and centre one steel.
http://www.ebay.co.uk/itm/FORD-ESCORT-MK1-MK2-1-3CC-GEAR-BOX-/361133812764?hash=item541540ac1c
Again another.
http://www.ebay.co.uk/itm/Ford-Escort-MK1-MK2-sport-4-speed-gear-box-rocket-bullet-replacement-/161820108871?hash=item25ad3ae847
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steve m
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| posted on 11/9/15 at 03:02 PM |
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Thanks for the response, but hopefully ive found the answer
I googled gearbox places local to me, and there was one only 3 miles away, so I took a non broken alui housing, to use as an example, but expecting
to get some spotty faced 17yr old to help 
But NO, the old guy on reception, must of been 80 !! and as soon as I told / showed him what the problem was, and that I had rebuilt the box about 8
months ago, he answered straight away with,
"when you inserted the layshaft in the box, you did not turn the keyed slot to match up with the tail housing and when all turned and clamped
up together, it will stop the layshaft spinning, but the gears would
But when you clamped it all up, it was binding, and closed up with a jolt (and it did, I remember!!)
that would of broken the lower lugs, and eventually would break the upper ones as well
WOW!! and he knew all that just by me showing him a non broken alui housing
as I was leaving, he also said, that around 30 years ago, he came across this problem almost weekly
I do hope my new best friend is right!, and he was such a nice guy
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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